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blockcheck.sh
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#!/bin/sh
EXEDIR="$(dirname "$0")"
EXEDIR="$(cd "$EXEDIR"; pwd)"
ZAPRET_BASE=${ZAPRET_BASE:-"$EXEDIR"}
ZAPRET_RW=${ZAPRET_RW:-"$ZAPRET_BASE"}
ZAPRET_CONFIG=${ZAPRET_CONFIG:-"$ZAPRET_RW/config"}
ZAPRET_CONFIG_DEFAULT="$ZAPRET_BASE/config.default"
CURL=${CURL:-curl}
[ -f "$ZAPRET_CONFIG" ] || {
[ -f "$ZAPRET_CONFIG_DEFAULT" ] && {
ZAPRET_CONFIG_DIR="$(dirname "$ZAPRET_CONFIG")"
[ -d "$ZAPRET_CONFIG_DIR" ] || mkdir -p "$ZAPRET_CONFIG_DIR"
cp "$ZAPRET_CONFIG_DEFAULT" "$ZAPRET_CONFIG"
}
}
[ -f "$ZAPRET_CONFIG" ] && . "$ZAPRET_CONFIG"
. "$ZAPRET_BASE/common/base.sh"
. "$ZAPRET_BASE/common/dialog.sh"
. "$ZAPRET_BASE/common/elevate.sh"
. "$ZAPRET_BASE/common/fwtype.sh"
. "$ZAPRET_BASE/common/virt.sh"
QNUM=${QNUM:-59780}
SOCKS_PORT=${SOCKS_PORT:-1993}
TPWS_UID=${TPWS_UID:-1}
TPWS_GID=${TPWS_GID:-3003}
NFQWS=${NFQWS:-${ZAPRET_BASE}/nfq/nfqws}
DVTWS=${DVTWS:-${ZAPRET_BASE}/nfq/dvtws}
WINWS=${WINWS:-${ZAPRET_BASE}/nfq/winws}
TPWS=${TPWS:-${ZAPRET_BASE}/tpws/tpws}
MDIG=${MDIG:-${ZAPRET_BASE}/mdig/mdig}
DESYNC_MARK=0x10000000
IPFW_RULE_NUM=${IPFW_RULE_NUM:-1}
IPFW_DIVERT_PORT=${IPFW_DIVERT_PORT:-59780}
DOMAINS=${DOMAINS:-rutracker.org}
CURL_MAX_TIME=${CURL_MAX_TIME:-2}
CURL_MAX_TIME_QUIC=${CURL_MAX_TIME_QUIC:-$CURL_MAX_TIME}
MIN_TTL=${MIN_TTL:-1}
MAX_TTL=${MAX_TTL:-12}
USER_AGENT=${USER_AGENT:-Mozilla}
HTTP_PORT=${HTTP_PORT:-80}
HTTPS_PORT=${HTTPS_PORT:-443}
QUIC_PORT=${QUIC_PORT:-443}
UNBLOCKED_DOM=${UNBLOCKED_DOM:-iana.org}
[ "$CURL_VERBOSE" = 1 ] && CURL_CMD=1
HDRTEMP=/tmp/zapret-hdr.txt
NFT_TABLE=blockcheck
DNSCHECK_DNS=${DNSCHECK_DNS:-8.8.8.8 1.1.1.1 77.88.8.1}
DNSCHECK_DOM=${DNSCHECK_DOM:-pornhub.com ntc.party rutracker.org www.torproject.org bbc.com}
DOH_SERVERS=${DOH_SERVERS:-"https://cloudflare-dns.com/dns-query https://dns.google/dns-query https://dns.quad9.net/dns-query https://dns.adguard.com/dns-query https://common.dot.dns.yandex.net/dns-query"}
DNSCHECK_DIG1=/tmp/dig1.txt
DNSCHECK_DIG2=/tmp/dig2.txt
DNSCHECK_DIGS=/tmp/digs.txt
IPSET_FILE=/tmp/blockcheck_ipset.txt
unset PF_STATUS
PF_RULES_SAVE=/tmp/pf-zapret-save.conf
unset ALL_PROXY
killwait()
{
# $1 - signal (-9, -2, ...)
# $2 - pid
kill $1 $2
# suppress job kill message
wait $2 2>/dev/null
}
exitp()
{
local A
echo
echo press enter to continue
read A
exit $1
}
pf_is_avail()
{
[ -c /dev/pf ]
}
pf_status()
{
pfctl -qsi | sed -nre "s/^Status: ([^ ]+).*$/\1/p"
}
pf_is_enabled()
{
[ "$(pf_status)" = Enabled ]
}
pf_save()
{
PF_STATUS=0
pf_is_enabled && PF_STATUS=1
[ "$UNAME" = "OpenBSD" ] && pfctl -sr >"$PF_RULES_SAVE"
}
pf_restore()
{
[ -n "$PF_STATUS" ] || return
case "$UNAME" in
OpenBSD)
if [ -f "$PF_RULES_SAVE" ]; then
pfctl -qf "$PF_RULES_SAVE"
else
echo | pfctl -qf -
fi
;;
Darwin)
# it's not possible to save all rules in the right order. hard to reorder. if not ordered pf will refuse to load conf.
pfctl -qf /etc/pf.conf
;;
esac
if [ "$PF_STATUS" = 1 ]; then
pfctl -qe
else
pfctl -qd
fi
}
pf_clean()
{
rm -f "$PF_RULES_SAVE"
}
opf_dvtws_anchor()
{
# $1 - tcp/udp
# $2 - port
# $3 - ip list
local iplist family=inet
[ "$IPV" = 6 ] && family=inet6
make_comma_list iplist "$3"
echo "set reassemble no"
[ "$1" = tcp ] && echo "pass in quick $family proto $1 from {$iplist} port $2 flags SA/SA divert-packet port $IPFW_DIVERT_PORT no state"
echo "pass in quick $family proto $1 from {$iplist} port $2 no state"
echo "pass out quick $family proto $1 to {$iplist} port $2 divert-packet port $IPFW_DIVERT_PORT no state"
echo "pass"
}
opf_prepare_dvtws()
{
# $1 - tcp/udp
# $2 - port
# $3 - ip list
opf_dvtws_anchor $1 $2 "$3" | pfctl -qf -
pfctl -qe
}
cleanup()
{
case "$UNAME" in
OpenBSD)
pf_clean
;;
esac
}
IPT()
{
$IPTABLES -C "$@" >/dev/null 2>/dev/null || $IPTABLES -I "$@"
}
IPT_DEL()
{
$IPTABLES -C "$@" >/dev/null 2>/dev/null && $IPTABLES -D "$@"
}
IPT_ADD_DEL()
{
on_off_function IPT IPT_DEL "$@"
}
IPFW_ADD()
{
ipfw -qf add $IPFW_RULE_NUM "$@"
}
IPFW_DEL()
{
ipfw -qf delete $IPFW_RULE_NUM 2>/dev/null
}
ipt6_has_raw()
{
ip6tables -nL -t raw >/dev/null 2>/dev/null
}
ipt6_has_frag()
{
ip6tables -A OUTPUT -m frag 2>/dev/null || return 1
ip6tables -D OUTPUT -m frag 2>/dev/null
}
ipt_has_nfq()
{
# cannot just check /proc/net/ip_tables_targets because of iptables-nft or modules not loaded yet
iptables -A OUTPUT -t mangle -p 255 -j NFQUEUE --queue-num $QNUM --queue-bypass 2>/dev/null || return 1
iptables -D OUTPUT -t mangle -p 255 -j NFQUEUE --queue-num $QNUM --queue-bypass 2>/dev/null
return 0
}
nft_has_nfq()
{
local res=1
nft delete table ${NFT_TABLE}_test 2>/dev/null
nft add table ${NFT_TABLE}_test 2>/dev/null && {
nft add chain ${NFT_TABLE}_test test
nft add rule ${NFT_TABLE}_test test queue num $QNUM bypass 2>/dev/null && res=0
nft delete table ${NFT_TABLE}_test
}
return $res
}
doh_resolve()
{
# $1 - ip version 4/6
# $2 - hostname
# $3 - doh server URL. use $DOH_SERVER if empty
$MDIG --family=$1 --dns-make-query=$2 | curl -s --data-binary @- -H "Content-Type: application/dns-message" "${3:-$DOH_SERVER}" | $MDIG --dns-parse-query
}
doh_find_working()
{
local doh
[ -n "$DOH_SERVER" ] && return 0
echo "* searching working DoH server"
DOH_SERVER=
for doh in $DOH_SERVERS; do
echo -n "$doh : "
if doh_resolve 4 iana.org $doh >/dev/null 2>/dev/null; then
echo OK
DOH_SERVER="$doh"
return 0
else
echo FAIL
fi
done
echo all DoH servers failed
return 1
}
mdig_vars()
{
# $1 - ip version 4/6
# $2 - hostname
hostvar=$(echo $2 | sed -e 's/[\.-]/_/g')
cachevar=DNSCACHE_${hostvar}_$1
countvar=${cachevar}_COUNT
eval count=\$${countvar}
}
mdig_cache()
{
# $1 - ip version 4/6
# $2 - hostname
local hostvar cachevar countvar count ip ips
mdig_vars "$@"
[ -n "$count" ] || {
# windows version of mdig outputs 0D0A line ending. remove 0D.
if [ "$SECURE_DNS" = 1 ]; then
ips="$(echo $2 | doh_resolve $1 $2 | tr -d '\r' | xargs)"
else
ips="$(echo $2 | "$MDIG" --family=$1 | tr -d '\r' | xargs)"
fi
[ -n "$ips" ] || return 1
count=0
for ip in $ips; do
eval ${cachevar}_$count=$ip
count=$(($count+1))
done
eval $countvar=$count
}
return 0
}
mdig_resolve()
{
# $1 - ip version 4/6
# $2 - hostname
local hostvar cachevar countvar count ip n
mdig_vars "$@"
if [ -n "$count" ]; then
n=$(random 0 $(($count-1)))
eval ip=\$${cachevar}_$n
echo $ip
return 0
else
mdig_cache "$@" && mdig_resolve "$@"
fi
}
mdig_resolve_all()
{
# $1 - ip version 4/6
# $2 - hostname
local hostvar cachevar countvar count ip ips n
mdig_vars "$@"
if [ -n "$count" ]; then
n=0
while [ "$n" -le $count ]; do
eval ip=\$${cachevar}_$n
if [ -n "$ips" ]; then
ips="$ips $ip"
else
ips="$ip"
fi
n=$(($n + 1))
done
echo "$ips"
return 0
else
mdig_cache "$@" && mdig_resolve_all "$@"
fi
}
netcat_setup()
{
[ -n "$NCAT" ] || {
if exists ncat; then
NCAT=ncat
elif exists nc; then
# busybox netcat does not support any required options
is_linked_to_busybox nc && return 1
NCAT=nc
else
return 1
fi
}
return 0
}
netcat_test()
{
# $1 - ip
# $2 - port
local cmd
netcat_setup && {
cmd="$NCAT -z -w 2 $1 $2"
echo $cmd
$cmd 2>&1
}
}
check_system()
{
echo \* checking system
UNAME=$(uname)
SUBSYS=
local s
# can be passed FWTYPE=iptables to override default nftables preference
case "$UNAME" in
Linux)
PKTWS="$NFQWS"
PKTWSD=nfqws
linux_fwtype
[ "$FWTYPE" = iptables -o "$FWTYPE" = nftables ] || {
echo firewall type $FWTYPE not supported in $UNAME
exitp 5
}
;;
FreeBSD)
PKTWS="$DVTWS"
PKTWSD=dvtws
FWTYPE=ipfw
[ -f /etc/platform ] && read SUBSYS </etc/platform
;;
OpenBSD)
PKTWS="$DVTWS"
PKTWSD=dvtws
FWTYPE=opf
;;
Darwin)
PKTWS="$DVTWS"
PKTWSD=dvtws
FWTYPE=mpf
;;
CYGWIN*)
UNAME=CYGWIN
PKTWS="$WINWS"
PKTWSD=winws
FWTYPE=windivert
;;
*)
echo $UNAME not supported
exitp 5
esac
echo $UNAME${SUBSYS:+/$SUBSYS} detected
echo firewall type is $FWTYPE
}
zp_already_running()
{
case "$UNAME" in
CYGWIN)
win_process_exists $PKTWSD || win_process_exists goodbyedpi
;;
*)
process_exists $PKTWSD || process_exists tpws
esac
}
check_already()
{
echo \* checking already running DPI bypass processes
if zp_already_running; then
echo "!!! WARNING. some dpi bypass processes already running !!!"
echo "!!! WARNING. blockcheck requires all DPI bypass methods disabled !!!"
echo "!!! WARNING. pls stop all dpi bypass instances that may interfere with blockcheck !!!"
fi
}
freebsd_module_loaded()
{
# $1 - module name
kldstat -qm "${1}"
}
freebsd_modules_loaded()
{
# $1,$2,$3, ... - module names
while [ -n "$1" ]; do
freebsd_module_loaded $1 || return 1
shift
done
return 0
}
check_prerequisites()
{
echo \* checking prerequisites
[ "$SKIP_PKTWS" = 1 -o "$UNAME" = Darwin -o -x "$PKTWS" ] && [ "$SKIP_TPWS" = 1 -o "$UNAME" = CYGWIN -o -x "$TPWS" ] && [ -x "$MDIG" ] || {
local target
case $UNAME in
Darwin)
target="mac"
;;
OpenBSD)
target="bsd"
;;
esac
echo $PKTWS or $TPWS or $MDIG is not available. run \"$ZAPRET_BASE/install_bin.sh\" or \`make -C \"$ZAPRET_BASE\" $target\`
exitp 6
}
local prog progs='curl'
[ "$SKIP_PKTWS" = 1 ] || {
case "$UNAME" in
Linux)
case "$FWTYPE" in
iptables)
ipt_has_nfq || {
echo NFQUEUE iptables or ip6tables target is missing. pls install modules.
exitp 6
}
progs="$progs iptables ip6tables"
;;
nftables)
nft_has_nfq || {
echo nftables queue support is not available. pls install modules.
exitp 6
}
progs="$progs nft"
;;
esac
;;
FreeBSD)
freebsd_modules_loaded ipfw ipdivert || {
echo ipfw or ipdivert kernel module not loaded
exitp 6
}
[ "$(sysctl -qn net.inet.ip.fw.enable)" = 0 -o "$(sysctl -qn net.inet6.ip6.fw.enable)" = 0 ] && {
echo ipfw is disabled. use : ipfw enable firewall
exitp 6
}
pf_is_avail && {
pf_save
[ "$SUBSYS" = "pfSense" ] && {
# pfsense's ipfw may not work without these workarounds
sysctl net.inet.ip.pfil.outbound=ipfw,pf 2>/dev/null
sysctl net.inet.ip.pfil.inbound=ipfw,pf 2>/dev/null
sysctl net.inet6.ip6.pfil.outbound=ipfw,pf 2>/dev/null
sysctl net.inet6.ip6.pfil.inbound=ipfw,pf 2>/dev/null
pfctl -qd
pfctl -qe
pf_restore
}
}
progs="$progs ipfw"
;;
OpenBSD|Darwin)
pf_is_avail || {
echo pf is not available
exitp 6
}
pf_save
progs="$progs pfctl"
;;
esac
}
case "$UNAME" in
CYGWIN)
SKIP_TPWS=1
;;
esac
for prog in $progs; do
exists $prog || {
echo $prog does not exist. please install
exitp 6
}
done
if exists nslookup; then
LOOKUP=nslookup
elif exists host; then
LOOKUP=host
else
echo nslookup or host does not exist. please install
exitp 6
fi
}
curl_translate_code()
{
# $1 - code
printf $1
case $1 in
0) printf ": ok"
;;
1) printf ": unsupported protocol"
;;
2) printf ": early initialization code failed"
;;
3) printf ": the URL was not properly formatted"
;;
4) printf ": feature not supported by libcurl"
;;
5) printf ": could not resolve proxy"
;;
6) printf ": could not resolve host"
;;
7) printf ": could not connect"
;;
8) printf ": invalid server reply"
;;
9) printf ": remote access denied"
;;
27) printf ": out of memory"
;;
28) printf ": operation timed out"
;;
35) printf ": SSL connect error"
;;
esac
}
curl_supports_tls13()
{
local r
$CURL --tlsv1.3 -Is -o /dev/null --max-time 1 http://127.0.0.1:65535 2>/dev/null
# return code 2 = init failed. likely bad command line options
[ $? = 2 ] && return 1
# curl can have tlsv1.3 key present but ssl library without TLS 1.3 support
# this is online test because there's no other way to trigger library incompatibility case
$CURL --tlsv1.3 --max-time $CURL_MAX_TIME -Is -o /dev/null https://iana.org 2>/dev/null
r=$?
[ $r != 4 -a $r != 35 ]
}
curl_supports_tlsmax()
{
# supported only in OpenSSL and LibreSSL
$CURL --version | grep -Fq -e OpenSSL -e LibreSSL -e BoringSSL -e GnuTLS -e quictls || return 1
# supported since curl 7.54
$CURL --tls-max 1.2 -Is -o /dev/null --max-time 1 http://127.0.0.1:65535 2>/dev/null
# return code 2 = init failed. likely bad command line options
[ $? != 2 ]
}
curl_supports_connect_to()
{
$CURL --connect-to 127.0.0.1:: -o /dev/null --max-time 1 http://127.0.0.1:65535 2>/dev/null
[ "$?" != 2 ]
}
curl_supports_http3()
{
# if it has http3 : curl: (3) HTTP/3 requested for non-HTTPS URL
# otherwise : curl: (2) option --http3-only: is unknown
$CURL --connect-to 127.0.0.1:: -o /dev/null --max-time 1 --http3-only http://127.0.0.1:65535 2>/dev/null
[ "$?" != 2 ]
}
hdrfile_http_code()
{
# $1 - hdr file
sed -nre '1,1 s/^HTTP\/1\.[0,1] ([0-9]+) .*$/\1/p' "$1"
}
hdrfile_location()
{
# $1 - hdr file
# some DPIs return CRLF line ending
tr -d '\015' <"$1" | sed -nre 's/^[Ll][Oo][Cc][Aa][Tt][Ii][Oo][Nn]:[ ]*([^ ]*)[ ]*$/\1/p'
}
curl_with_subst_ip()
{
# $1 - domain
# $2 - port
# $3 - ip
# $4+ - curl params
local connect_to="--connect-to $1::[$3]${2:+:$2}" arg
shift ; shift ; shift
[ "$CURL_VERBOSE" = 1 ] && arg="-v"
[ "$CURL_CMD" = 1 ] && echo $CURL ${arg:+$arg }$connect_to "$@"
ALL_PROXY="$ALL_PROXY" $CURL ${arg:+$arg }$connect_to "$@"
}
curl_with_dig()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - port
# $4+ - curl params
local dom=$2 port=$3
local ip=$(mdig_resolve $1 $dom)
shift ; shift ; shift
if [ -n "$ip" ]; then
curl_with_subst_ip $dom $port $ip "$@"
else
return 6
fi
}
curl_probe()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - port
# $4 - subst ip
# $5+ - curl params
local ipv=$1 dom=$2 port=$3 subst=$4
shift; shift; shift; shift
if [ -n "$subst" ]; then
curl_with_subst_ip $dom $port $subst "$@"
else
curl_with_dig $ipv $dom $port "$@"
fi
}
curl_test_http()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - subst ip
# $4 - "detail" - detail info
local code loc
curl_probe $1 $2 $HTTP_PORT "$3" -SsD "$HDRTEMP" -A "$USER_AGENT" --max-time $CURL_MAX_TIME $CURL_OPT "http://$2" -o /dev/null 2>&1 || {
code=$?
rm -f "$HDRTEMP"
return $code
}
if [ "$4" = "detail" ] ; then
head -n 1 "$HDRTEMP"
grep "^[lL]ocation:" "$HDRTEMP"
else
code=$(hdrfile_http_code "$HDRTEMP")
[ "$code" = 301 -o "$code" = 302 -o "$code" = 307 -o "$code" = 308 ] && {
loc=$(hdrfile_location "$HDRTEMP")
echo "$loc" | grep -qE "^https?://.*$2(/|$)" ||
echo "$loc" | grep -vqE '^https?://' || {
echo suspicious redirection $code to : $loc
rm -f "$HDRTEMP"
return 254
}
}
fi
rm -f "$HDRTEMP"
[ "$code" = 400 ] && {
# this can often happen if the server receives fake packets it should not receive
echo http code $code. likely the server receives fakes.
return 254
}
return 0
}
curl_test_https_tls12()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - subst ip
# do not use tls 1.3 to make sure server certificate is not encrypted
curl_probe $1 $2 $HTTPS_PORT "$3" -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME $CURL_OPT --tlsv1.2 $TLSMAX12 "https://$2" -o /dev/null 2>&1
}
curl_test_https_tls13()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - subst ip
# force TLS1.3 mode
curl_probe $1 $2 $HTTPS_PORT "$3" -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME $CURL_OPT --tlsv1.3 $TLSMAX13 "https://$2" -o /dev/null 2>&1
}
curl_test_http3()
{
# $1 - ip version : 4/6
# $2 - domain name
# force QUIC only mode without tcp
curl_with_dig $1 $2 $QUIC_PORT -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME_QUIC --http3-only $CURL_OPT "https://$2" -o /dev/null 2>&1
}
ipt_aux_scheme()
{
# $1 - 1 - add , 0 - del
# $2 - tcp/udp
# $3 - port
# to avoid possible INVALID state drop
[ "$2" = tcp ] && IPT_ADD_DEL $1 INPUT -p $2 --sport $3 ! --syn -j ACCEPT
# for strategies with incoming packets involved (autottl)
IPT_ADD_DEL $1 OUTPUT -p $2 --dport $3 -m conntrack --ctstate INVALID -j ACCEPT
if [ "$IPV" = 6 -a -n "$IP6_DEFRAG_DISABLE" ]; then
# the only way to reliable disable ipv6 defrag. works only in 4.16+ kernels
IPT_ADD_DEL $1 OUTPUT -t raw -p $2 -m frag -j CT --notrack
elif [ "$IPV" = 4 ]; then
# enable fragments
IPT_ADD_DEL $1 OUTPUT -f -j ACCEPT
fi
# enable everything generated by nfqws (works only in OUTPUT, not in FORWARD)
# raw table may not be present
IPT_ADD_DEL $1 OUTPUT -t raw -m mark --mark $DESYNC_MARK/$DESYNC_MARK -j CT --notrack
}
ipt_scheme()
{
# $1 - tcp/udp
# $2 - port
# $3 - ip list
local ip
$IPTABLES -t mangle -N blockcheck_output 2>/dev/null
$IPTABLES -t mangle -F blockcheck_output
IPT OUTPUT -t mangle -j blockcheck_output
# prevent loop
$IPTABLES -t mangle -A blockcheck_output -m mark --mark $DESYNC_MARK/$DESYNC_MARK -j RETURN
$IPTABLES -t mangle -A blockcheck_output ! -p $1 -j RETURN
$IPTABLES -t mangle -A blockcheck_output -p $1 ! --dport $2 -j RETURN
for ip in $3; do
$IPTABLES -t mangle -A blockcheck_output -d $ip -j NFQUEUE --queue-num $QNUM
done
ipt_aux_scheme 1 $1 $2
}
nft_scheme()
{
# $1 - tcp/udp
# $2 - port
# $3 - ip list
local iplist ipver=$IPV
[ "$IPV" = 6 ] || ipver=
make_comma_list iplist $3
nft add table inet $NFT_TABLE
nft "add chain inet $NFT_TABLE postnat { type filter hook output priority 102; }"
nft "add rule inet $NFT_TABLE postnat meta nfproto ipv${IPV} $1 dport $2 mark and $DESYNC_MARK != $DESYNC_MARK ip${ipver} daddr {$iplist} queue num $QNUM"
# for strategies with incoming packets involved (autottl)
nft "add chain inet $NFT_TABLE prenat { type filter hook prerouting priority -102; }"
# enable everything generated by nfqws (works only in OUTPUT, not in FORWARD)
nft "add chain inet $NFT_TABLE predefrag { type filter hook output priority -402; }"
nft "add rule inet $NFT_TABLE predefrag meta nfproto ipv${IPV} mark and $DESYNC_MARK !=0 notrack"
}
pktws_ipt_prepare()
{
# $1 - tcp/udp
# $2 - port
# $3 - ip list
local ip
case "$FWTYPE" in
iptables)
ipt_scheme $1 $2 "$3"
;;
nftables)
nft_scheme $1 $2 "$3"
;;
ipfw)
# disable PF to avoid interferences
pf_is_avail && pfctl -qd
for ip in $3; do
IPFW_ADD divert $IPFW_DIVERT_PORT $1 from me to $ip $2 proto ip${IPV} out not diverted not sockarg
done
;;
opf)
opf_prepare_dvtws $1 $2 "$3"
;;
windivert)
WF="--wf-l3=ipv${IPV} --wf-${1}=$2"
rm -f "$IPSET_FILE"
for ip in $3; do
echo $ip >>"$IPSET_FILE"
done
;;
esac
}
pktws_ipt_unprepare()
{
# $1 - tcp/udp
# $2 - port
case "$FWTYPE" in
iptables)
ipt_aux_scheme 0 $1 $2
IPT_DEL OUTPUT -t mangle -j blockcheck_output
$IPTABLES -t mangle -F blockcheck_output 2>/dev/null
$IPTABLES -t mangle -X blockcheck_output 2>/dev/null
;;
nftables)
nft delete table inet $NFT_TABLE 2>/dev/null
;;
ipfw)
IPFW_DEL
pf_is_avail && pf_restore
;;
opf)
pf_restore
;;
windivert)
unset WF
rm -f "$IPSET_FILE"
;;
esac
}
pktws_ipt_prepare_tcp()
{
# $1 - port
# $2 - ip list
local ip iplist ipver
pktws_ipt_prepare tcp $1 "$2"
# for autottl mode
case "$FWTYPE" in
iptables)
$IPTABLES -N blockcheck_input -t mangle 2>/dev/null
$IPTABLES -F blockcheck_input -t mangle 2>/dev/null
IPT INPUT -t mangle -j blockcheck_input
$IPTABLES -t mangle -A blockcheck_input ! -p tcp -j RETURN
$IPTABLES -t mangle -A blockcheck_input -p tcp ! --sport $1 -j RETURN
$IPTABLES -t mangle -A blockcheck_input -p tcp ! --tcp-flags SYN,ACK SYN,ACK -j RETURN
for ip in $2; do
$IPTABLES -A blockcheck_input -t mangle -s $ip -j NFQUEUE --queue-num $QNUM
done
;;
nftables)
ipver=$IPV
[ "$IPV" = 6 ] || ipver=
make_comma_list iplist $2
nft "add rule inet $NFT_TABLE prenat meta nfproto ipv${IPV} tcp sport $1 tcp flags & (syn | ack) == (syn | ack) ip${ipver} saddr {$iplist} queue num $QNUM"
;;
ipfw)
for ip in $2; do
IPFW_ADD divert $IPFW_DIVERT_PORT tcp from $ip $1 to me proto ip${IPV} tcpflags syn,ack in not diverted not sockarg
done
;;
esac
}
pktws_ipt_unprepare_tcp()
{
# $1 - port
pktws_ipt_unprepare tcp $1
case "$FWTYPE" in
iptables)
IPT_DEL INPUT -t mangle -j blockcheck_input
$IPTABLES -t mangle -F blockcheck_input 2>/dev/null
$IPTABLES -t mangle -X blockcheck_input 2>/dev/null
;;
esac
}
pktws_ipt_prepare_udp()
{
# $1 - port
# $2 - ip list
pktws_ipt_prepare udp $1 "$2"
}
pktws_ipt_unprepare_udp()
{
# $1 - port
pktws_ipt_unprepare udp $1
}
pktws_start()
{
case "$UNAME" in
Linux)
"$NFQWS" --uid $TPWS_UID:$TPWS_GID --dpi-desync-fwmark=$DESYNC_MARK --qnum=$QNUM "$@" >/dev/null &
;;
FreeBSD|OpenBSD)
"$DVTWS" --port=$IPFW_DIVERT_PORT "$@" >/dev/null &
;;
CYGWIN)
"$WINWS" $WF --ipset="$IPSET_FILE" "$@" >/dev/null &
;;
esac
PID=$!
# give some time to initialize
minsleep
}
tpws_start()
{
local uid
[ -n "$HAVE_ROOT" ] && uid="--uid $TPWS_UID:$TPWS_GID"
"$TPWS" $uid --socks --bind-addr=127.0.0.1 --port=$SOCKS_PORT "$@" >/dev/null &
PID=$!
# give some time to initialize
minsleep
}
ws_kill()
{
[ -z "$PID" ] || {
killwait -9 $PID 2>/dev/null
PID=
}
}
check_domain_port_block()
{
# $1 - domain
# $2 - port
local ip ips
echo
echo \* port block tests ipv$IPV $1:$2
if netcat_setup; then
ips=$(mdig_resolve_all $IPV $1)
if [ -n "$ips" ]; then
for ip in $ips; do
if netcat_test $ip $2; then
echo $ip connects
else
echo $ip does not connect. netcat code $?
fi
done
else
echo "ipv${IPV} $1 does not resolve"
fi
else
echo suitable netcat not found. busybox nc is not supported. pls install nmap ncat or openbsd netcat.
fi
}
curl_test()
{
# $1 - test function
# $2 - domain
# $3 - subst ip
# $4 - param of test function
local code=0 n=0
while [ $n -lt $REPEATS ]; do
n=$(($n+1))
[ $REPEATS -gt 1 ] && printf "[attempt $n] "
if $1 "$IPV" $2 $3 "$4" ; then
[ $REPEATS -gt 1 ] && echo 'AVAILABLE'
else
code=$?
[ "$SCANLEVEL" = quick ] && break
fi
done
[ "$4" = detail ] || {
if [ $code = 254 ]; then
echo "UNAVAILABLE"
elif [ $code = 0 ]; then
echo '!!!!! AVAILABLE !!!!!'
else
echo "UNAVAILABLE code=$code"
fi
}
return $code
}
ws_curl_test()
{
# $1 - ws start function
# $2 - test function
# $3 - domain
# $4,$5,$6, ... - ws params
local code ws_start=$1 testf=$2 dom=$3
shift
shift